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Endothelium and acute coronary syndromes
1Department of Medicine, Boston, MA 02115, USA. jliao@bustoff.bwh.harvard.edu
Insights
Endothelial dysfunction, marked by impaired vascular endothelium function, is an early sign of atherosclerosis. This dysfunction contributes significantly to the development of atherosclerotic vessels and acute coronary syndromes.
Area of Science:
- Cardiovascular Science
- Vascular Biology
- Endocrinology
Background:
- The vascular endothelium is a critical endocrine organ regulating vessel wall activity and vascular lumen hemostasis.
- Risk factors like smoking, hypertension, and high lipids impair endothelial function, initiating atherosclerosis.
- Atherosclerotic lesions progress from early foam cells to complex plaques with lipid cores and fibrous caps.
Purpose of the Study:
- To highlight the role of endothelial dysfunction as an early marker of atherosclerosis.
- To emphasize the contribution of endothelial dysfunction to the atherogenic process.
Main Methods:
- Review of evidence linking endothelial dysfunction to atherosclerosis development.
- Analysis of the progression of atherosclerotic lesions.
- Examination of plaque rupture and thrombosis mechanisms.
Main Results:
- Endothelial dysfunction precedes the development of atherosclerotic vessels.
- Impaired endothelial function is a key factor in the atherogenic process.
- Plaque rupture and thrombosis can lead to acute coronary syndromes.
Conclusions:
- Endothelial dysfunction is an early and critical indicator of atherosclerosis.
- Maintaining endothelial health is vital for preventing cardiovascular events.
Abstract:
The vascular endothelium is a dynamic endocrine organ that regulates contractile, secretory, and mitogenic activities in the vessel wall and hemostatic processes within the vascular lumen. Risk factors for atherosclerosis such as cigarette smoking, hypertension, and increased serum lipid concentrations impair endothelial function and lead to the development of atherosclerotic vessels, which cause acute coronary syndromes. Atherosclerotic vessels progress from scattered foam cells to complex lesions with a lipid core and fibrous cap. Factors that weaken and cause the rupture of the fibrous cap will expose circulating blood products to the procoagulant materials in the lipid core. Thrombosis and subsequent remodeling of the unstable plaque may be catastrophic or clinically silent depending on the degree of vascular occlusion and availability of collateral blood flow. Evidence is presented that supports the view that endothelial dysfunction is an early marker of atherosclerosis and an important contributor to the atherogenic process.